Cushion device for log-turners.



No. 547,760. Patented Apr. l7, I900.

J. N. QUINN. CUSHION DEVICE FOR LOG TUBNEBS.

(Application filed Feb. 2, 1900.)

(No Model.)

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STATES PATENT OFFICE.-

JOHN N. QUINN, OF CINCINNATI, OHIO.

CUSHION DEVICE FOR LOG-TURNERS.

SPECIFICATION forming part of Letters Patent N 0. 647,760, dated April 1'7, 1900. Application filed February 2, 1900- Serial No. 3,668 (No model) To all whom it mayconcernr Be it known that I, JOHN N. QUINN, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Cushion Devices for Log- Turners, of which the following is a specification.

My invention relates to that class of logturning devices in which the toothed bar or nigger-bar is operated by power to turn the log.

The object of my invention is to provide a cushion-stop for each fore-and-aft motion of the nigger-bar which will be effective, strong, and durable and of simple and cheap construction.

The features of my invention will be more fully set forth in the description of the accompanying drawin gs,forming a part of this specification, in which-- Figurel is a side elevation of my improvement mounted upon a log-deck, shown in sec- .tion, and log carriage and track. Fig. 2 is a top plan view of the cushion-stop. Fig. 3 is a section on line 5a m, Fig. 2. Fig. 4 is a vertical section on line y y, Fig. 2.

A represents the floor of the mill, mounted on sleepers A. B represents the carriage, and B the carriage-track. 0 represents the logdeck, and D the logway. E represents the toothed or nigger bar. These parts may be of any ordinary construction and arrangement.

F represents my cushion stop device. This cushion device consists of three parts-chiefly, an open hollow frame made integral and forming the guideway for the toothed bar; second, removable stops connected at the ends of the guideway, and, third, the spring cushioning device, with proper means to sustain and form the seats of the springs. In order to dispense as far as possible with nuts which receive shocks, and consequently are liable to wear and get loose, I mount this frame on the log-deck and provide the following means for allowing said frame to reciprocate as the preferable mode of construction:

(2 represents slots pierced through the horizontal flanges of the frame F. b represents lag-screws with an enlarged head or washer b, which spans the slot at and holds the frame formed through the stops.

from rising". These parts do not receive the thrust of the fore-and-aft movement and'are simply employed to hold the frame down and to guide it in its longitudinal travel, prevent ing lateral movement. These holding-down and guiding .devices may be of any common form of construction.

G represents detachable stops secured to the sides and ends within the guideway, as shown in plan view, Fig. 2. These are re quired to be renewed from time to time and at the same time they must be held very rigidly in position, as they receive the full force of the blow of the toothed bar. To accomplish this, I preferably employ rivets c, the heads of which lie in countersunk holes 01 represents a head which is formed by upsetting the end of the rivet. v WVhen it is desired to renew these stops, the frame is removed from the log-deck,

the heads of the rivets are cut off with a coldchisel, and the stops and rivets renewed.

The cushioning device consists of two springs I J, which are sustained in position by the rod H, attached to and suspended by the frame -head K at one end and by the spring-stop seat-plate L. This stop seat-plate is anchored within gains cut in the log-deck, as shown in Fig; 2. These gains are made deep-the full depth of the plateso that they may firmly withstand the shocks they receive by the blows of the toothed bar. 6 represents an orifice pierced through this plate to receive and sustain the rod H at its central position. The plate L and the head K form the sustaining elements of the rod H.

I J represent coil-springs. Spring I seats against head K at one end and against the stopplate L at the other end. One end of spring J seats against the stop-plate L and the other end against a washer-plate O, suspended upon rod H.

g 72. represent lock or jam nuts.

It will be observed that the springs I J lie in a central plane to the center of a toothed bar and the center of the reciprocating frame, thereby avoiding all tendency of lateral movement from side or partially-side strokes. It

will also be observed that the stop-plate L serves as the stop to cushion the blow through the springs by the reciprocation of the stop- 7 but the blows are received on the firmly-anchored stops G, which are firmly anchored to the reciprocating frame and adapted to be renewed from time to time, as occasion requires. Having described my invention, what I claim is 1'.'A cushion-stop for a toothed bar composed of an integral hollow frame having stops rigidly connected at thesides and ends within the guideway, tandem springs suspended by a rod connected to the head of said frame at one end and having a sliding hearing in the intermediate cushion-plate rigidly supported between and forming'a seat for said springs. P

2. In a spring cushion device, in combina tion with a reciprocating hollow frame form'- ing a guideway for the toothed bar and stops at each end ofthe guideway, the cushionplate L firmly anchored and formin'ga support and seat for tandem of springs located at eachside thereof, supported by a rod connected to said frame and having a sliding my. hand.

bearingin said plate substantially as specified.

' 3[ In a cushioning device for a toothed bar,

the combination with the log-deck of a reciprocating hollow frame vertically supported thereon means for guiding said frame in its reciprocating movement and tandem of springstop devices located in a longitudinal central plane to the center'of said frame and seating and stopping devices for cushioning the spring movement, substantially as specified. 4. A cushioning device for a toothed bar consisting of a longitudinal reciprocating frame mounted upon a log-deck and having a guideway for the toothed bar, stop devices at each end of the guideway and tandem of spring-cushioning devices lying in the same longitudinal plane secured to the frame and log-deck,said springs being adapted to cushion thealternate blows of the toothed bar, substantially as specified.

5. A cushion-stop for nigger-bars consisting of a single floor-plate movable longitudinally on the framework in the direction of strain,'a central guideway for the nigger or toothed bar in said plate, and a centrally-disposed cushioning device locatedat one end of the plate, substantially as specified.

In testimony whereof I have hereunto set I JOHN N. QUINN.

Witnesses:

OLIVER B. KAISER, EDWD. T. ALEXANDER. 

